obama may be about to do a walk-through of the arena. meanwhile, a half a world away we're learning of some major terror arrests in india. members of the group tied to the horrific mumbai attack four years ago may have been planning new attacks. a live report. >>> and a frightening scene at a monster truck rally here in the u.s. we have more of this scary video to show you coming up. jenna: well, to holiday for politics and no holiday for the team of "happening now." jon: that's right. jenna: and we're willing to not have a holiday. jon: happy to be here today. [laughter] jenna: we really are, because it is a big week ahead. democrats and republicans hitting the campaign trail, north carolina's gearing up for the democratic national convention. it is their turn this week, the democrats. we're glad your with us on this labor day, i'm jenna lee. jon: plus we get free barbecue lunch down the hallway. jenna: do we? jon: i think we do. [laughter] the president addressing a rally of united autoworkers in toledo, ohio, before heading to louisia